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support dual encoding in LTRIM

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This commit is contained in:
Pieter Noordhuis 2010-05-30 02:16:12 +02:00
parent a6dd455b09
commit 9ae6b0be4a
1 changed files with 17 additions and 10 deletions
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27
redis.c
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@ -5087,8 +5087,7 @@ static void ltrimCommand(redisClient *c) {
if ((o = lookupKeyWriteOrReply(c,c->argv[1],shared.ok)) == NULL || if ((o = lookupKeyWriteOrReply(c,c->argv[1],shared.ok)) == NULL ||
checkType(c,o,REDIS_LIST)) return; checkType(c,o,REDIS_LIST)) return;
list = o->ptr; llen = lLength(o);
llen = listLength(list);
/* convert negative indexes */ /* convert negative indexes */
if (start < 0) start = llen+start; if (start < 0) start = llen+start;
@ -5108,15 +5107,23 @@ static void ltrimCommand(redisClient *c) {
} }
/* Remove list elements to perform the trim */ /* Remove list elements to perform the trim */
for (j = 0; j < ltrim; j++) { if (o->encoding == REDIS_ENCODING_ZIPLIST) {
ln = listFirst(list); o->ptr = ziplistDeleteRange(o->ptr,0,ltrim);
listDelNode(list,ln); o->ptr = ziplistDeleteRange(o->ptr,-rtrim,rtrim);
} else if (o->encoding == REDIS_ENCODING_LIST) {
list = o->ptr;
for (j = 0; j < ltrim; j++) {
ln = listFirst(list);
listDelNode(list,ln);
}
for (j = 0; j < rtrim; j++) {
ln = listLast(list);
listDelNode(list,ln);
}
} else {
redisPanic("Unknown list encoding");
} }
for (j = 0; j < rtrim; j++) { if (lLength(o) == 0) deleteKey(c->db,c->argv[1]);
ln = listLast(list);
listDelNode(list,ln);
}
if (listLength(list) == 0) deleteKey(c->db,c->argv[1]);
server.dirty++; server.dirty++;
addReply(c,shared.ok); addReply(c,shared.ok);
} }